Juan Fernandez Petrel
A species of Gadfly Petrels Scientific name : Pterodroma externa Genus : Gadfly Petrels
Juan Fernandez Petrel, A species of Gadfly Petrels
Botanical name: Pterodroma externa
Genus: Gadfly Petrels
Content
Description General Info
Photo By Don Roberson 
Description
The Juan Fernández petrel is a large species of gadfly petrel, 43 cm (17 in) long with a wingspan of 95–97 cm (37–38 in) and a mass of 500 g (1.1 lb). The upperparts are dark brownish-grey and there is a black M-shaped marking across the extended wings. The underparts are white, with the underside of the wing is edged black. The face is white, with a black "cap" extending below the eyes. The feet are yellow, dark brown at the tips. The bill is black with a hooked tip and houses the tubular nostrils that are unique to Procellariiformes. 
Size
41 - 81 cm
Feeding Habits
Juan Fernandez Petrel primarily feast on squid, flying-fish, and Vinciguerria. They exhibit nocturnal foraging behaviors over the ocean and are adept at capturing sea skaters. Unique adaptations allow juan Fernandez Petrel to exploit these foods effectively.
Habitat
Juan Fernandez Petrel primarily inhabit open ocean environments, being marine and highly pelagic outside of the breeding season. They are rarely seen near land except when breeding, which takes place in elevated regions typically ranging from 600 to 1000 meters above sea level. The breeding habitat consists of slopes and ridges. Here, juan Fernandez Petrel nest in areas dominated by fern (Dicksonia externa) forests or grasslands, reflecting a preference for specific vegetative characteristics in their nesting sites.
Dite type
Piscivorous
General Info
Distribution Area
During the breeding season, the petrels forage in waters surrounding Isla Alejandro Selkirk and Isla Robinson Crusoe (both islands in the Juan Fernández Archipelago), as well as coastal Chile. The birds can be found in flocks with pink-footed shearwaters and other seabirds. During the non-breeding season, the petrels forage in the equatorial currents and counter-currents, as far north as the Hawaiian Islands. It has been recorded as a vagrant in Australia, the Chatham Islands in New Zealand, Fiji, and the United States (in Arizona and Oregon). The petrel breeds only on one island in Chile, Isla Alejandro Selkirk. The breeding population was estimated at 1 million pairs in 1985–86, and there may be up to 3–5 million birds globally. It is threatened at its nesting sites by predation from introduced species (cats and rats) and, to a lesser extent, from habitat loss caused by introduced herbivores (goats). The IUCN Red List lists the species as vulnerable due to its endemic status and threats from introduced predators.
Photo By Don Roberson 
Scientific Classification
Phylum
Chordates Class
Birds Order
Albatrosses and Petrels Family
Shearwaters and petrels Genus
Gadfly Petrels Species
Juan Fernandez Petrel 
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